I love fireworks; the sight, the sound, the smell. Every year the Bluewater Festival is held at Shorncliffe to mark the beginning of Australia's second-biggest yacht race, the Brisbane to Gladstone, and they always have fireworks. This year my firework shots were photo-bombed by the moon!
There are two tricks I know of to get great firework photos. The first is pre-focusing. Handily the firework barge had a small light on it that I could manually focus on before the display started. I took several test shots with long exposures and high ISO to ensure everything was pin-sharp.
The second is using a slightly longer exposure time to capture the movement of the sparks through the sky. How long depends on the display and the wind and your taste. For these shots I used f/8, to give me a decent depth of field and the best sharpness, a shutter speed of 1.2", and an ISO of 800. I quickly dropped the ISO to 400 then 200 as I was getting too much glow from the smoke. For the finale with lots of fireworks going off I dropped ISO to 100. I also played a lot with the shutter speed, trying out different exposure times between 1.2 and 5" just to see what would happen. It was a lot of fun, trying to judge the right exposure time and timing my shots right with the booms of the mortars exploding. I didn't get them all right, but these are my favourites.